pelcin



A. L. PELCIN MULTIPLE-BOLT FLUSH DOOR LOCK Feb.21, 1956 2 Sheets-Sheet 1 Filed April 8, 1953 1N VEN TOR. saw-L. PELC/N "I I I 9W4 I Arra N Feb. 21, 1956 Filed April 8, 1953 A. L. PELCIN MULTIPLE-BOLT FLUSH DOOR LOCK 2 Sheets-Sheet 2 INVEN TOR. A as??- PELc/N Unit d at$.1@?1i 2,735,706 MULTIPLE-BOLT FLUSH noon LOCK Albert L. Pelcin, Maple Heights, Ohio, assignor to The Eastern Malleable Iron Company, Cleveland, Ohio, a corporation of Connecticut This invention relates to lock mechanisms for doors and the like and, more particularly, to a novel lock mechanism of the multiple-bolt type. t

An object of the invention is to provide a novel lock mechanism of the multiple-bolt type having cooperating wedge means between the bolts and eifective to cause movement of one bolt in response to actuation of another of the bolts. 1

Another object of the invention is to provide a novel lock mechanism of the multiple-bolt type in which the lock body has intersecting guideways and in which a first bolt slidable in one of the guideways and a pair of plungers slidable in the other guideway havefwedge elements in cooperating engagement such that movement of the first bolt along its guideway wedgingly imparts outward movement to the plunger along the other guideway.

Still another object is to provide a-novel lock mechanism of this character in which the lock body is of. a substantially pan-like shape adapted for substantially flush mounting in an opening of a door surface and in which a movable actuating handle supported by the body for pivotal movement has a plate portion disposed in and forming a partial cover for the pan recess, the flush type lock construction thus provided being especially suitable for thedoors of utility trucks and other automotive vehicles where it is desirable to avoid having any projecting part likely to cause personal injury.

A further object is to provide novellock mechanism of the above-mentioned multiple-bolt type in which the bolts comprise such a slidable first bolt and other slidably movable bolts located on opposite sides of the lock body and in which motion transmitting means for transmitting actuating movement to the other movable bolts from the slidable plungers includes links connected with the latter. Yet another object is to provide novel lock mechanism of the. character above referred to in which spring means iseifective to constantly maintain the wedge elements of the bolt plungers in operative engagement. 7 r 'Additionally, this invention flpro'vides novel lock mechanism of the above indicated kind in which the spring means acts to normally hold the bolts in their extended positionfand tonormallyhold the handle in its retracted position, and in-which the links connected with the plungers extend in transverse crossingrelation to the lockbody." v g The "invention can be further briefly summarized as consisting in certain novel combinatipnsand "arrangements of parts hereinafter described and particularly set out in the claimsihereof. i

Iii-the accompanying sheets ofdrawingsi Fig, 1 is arear elevational view showing lock mechanism embodying the invention and mounted .on a door;

Fig. 2 is a view of the lock mechanism showing the "same mainly in-vertical section, the view being taken substantially as indicated by section line -22 of Fig. 1; #Fig; 3 isa front elevation of the main unit of the lock 2,735,705 Patented Feb. 21, 1956 7 unit on a door;

Fig. 4 is a rear elevation of the main lock unit showing the same with portions thereof broken away;

Fig. 5 is a sectional view taken through the main lock unit as indicated by section line 55 of Fig. 4;

Fig. 6 is an edge view of the main lock unit as seen from the lower edge thereof; and

Fig. 7 is a perspective view showing one of the plungers in detached relation.

As representing one practical embodiment of the invention, the drawings show the lock mechanism 10 mounted on a swingable door 11 and consisting, in genera], of a main lock unit 12 located at an intermediate point of the door, and a pair of auxiliary lock units 13 located on the door at spaced points on opposite sides of the main unit and operably connected with the latter by the links 14 and 15. The main unit 12 is in a substantially flush relation with the front surface 16 of the door 11 by being disposed in an opening or recess 17 which extends into or through the door from the front thereof.

The main unit 12 of the lock mechanism 10 is provided with a substantially pan-like sheet metal body 18 of a generally rectangular shape and having walls, including a pair of spaced side walls 19 and 20 and a bottom wall 21, and which walls define a shallow recess or pocket 22. The pan-like body 18 is also provided with flange 23 extending therearound and is mounted in the opening 17 by the engagement of the flange'23 with the front surface 16 of the door 11.

The main lock unit 12 also includes intersecting guideways 25 and 26 located on or in the body 18 and of which the guideway 25 isdefined by a channel-shaped sheet metal member 27 suitably secured to the bottom wall 21 on the rear side thereof. The guideway 26 is defined by a channel-shaped sheet metal member 23 which is also suitably secured to the bottom wall 21 on the rear side thereof. The channel-shaped members 27 and 28 are so constructed and arranged that the guideway 25, which can be referred to as the longitudinal or main guideway, intersects the transverse or auxiliary guideway 26 at substantially right angles and at an intermediate point thereof. 7

, As shown in thedrawings, the main lock unit 12 also comprises a firstbolt 29 slidably movable in the longitudinal guideway 25, and a pair of plungers 30 and 31 slidably movable in the transverse guideway 26 and having their inner ends presented toward the inner end of the first bolt.

The inner ends 'of the plungers 30 and 31 are provided with oppositely or divergently inclined bearing surfaces end of such first bolt and which projection engages in the wedge recess 32. The bearing surfaces 30 and 31 of the plungers are in slidable engagement with the bearing surfaces 29 and 29 of the first bolt 29, such that the movement of the latter inwardly of the guideway 25 wedges the plungers apart and causes slidable outward movement thereof in the transverse guideway 26.

Outward movement of the plungers 30 and 31 in the transverse guideway 26, causes the outer ends of these plungers to be projected from the opposite ends of this guideway. The plungers are retained in the transverse guideway 26 by being provided with outwardly facing shoulders 34 which are engageable with inturned stop lugs 35 formed on the channel-shaped member 28 and I located 'at the outer ends of the guideway 26. The extent of outward movement of theplungers 30 and 31 in the guideway 26 is thus limited by the engagement of the shoulders 34 with the stop lugs 35.

Movement of the first bolt 29 along the guideway in a direction to expand or project the plungers and 31, is produced by handle means 37 which is supported by the body 18 for pivotal movement. The handle means 37 comprises a plate member 38 disposed in and forming a partial cover for the recess 22, and an arm 39 carried by the plate member 38 as by being secured to the underside thereof and projecting into the guideway 25 through the slot 40 of the bottom wall 21.

The plate member 38 has inturned side flanges 41 and 42 thereon and is pivotally mounted on the body 18 by suitable pivot elements, such as rivets or the like 43 and 44, which extend through these flanges and through the side walls 19 and 20 of the body. At the point where these rivets extend through the side walls 19 and 20, the body 18 is suitably reinforced by clips 45 and 46 which are welded, or otherwise secured, to such side walls. The plate member 38 has its free end 38 curved slightly outwardly and spaced from the end wall '47 of the body 18 so as to provide therebetween a clear space or opening 48 for the free insertion of an operators fingers into the recess 22 and beneath the plate member of the handle means 37 The actuating arm 39 of the handle means 37 is provided on the inner end thereof with a rounded head or cam portion 49 which extends into a longitudinal slot 50 of the first bolt 29 and is engageable with a thrust surface 51 formed on the first bolt by the inner end wall of the slot 59. The normal retracted position of the handle means 37 is that shown in the drawings in which the plate member 38 occupies a position substantially flush with the front door surface 16. Outward swinging of the plate member 38 on the pivot elements 43 and 44 causes the actuating arm 39 to impart inward or retracting movement to the first bolt 29 which, through the action of the cooperating wedge means, also produces an outward separating movement of the plungers 30 and 31, as explained above.

If desired, the outer ends of the plungers 30 and 31 can be used as auxiliary bolts, but as shown in the drawings, the lock mechanism 10 is preferably provided with a pair of auxiliary bolts 52 which are slidably movable in housing members 53 of the auxiliary lock units 13. The auxiliary bolts 52 are normally in a projected position. to which they are urged by compression springs 54 located in the housing members 53. The auxiliary bolts 52 are adapted to be retracted against the force of the compression springs 54 by motion transmitting means which includes the above-mentioned links 14 and 15 and bell crank levers 55 pivotally mounted in the housing members 53.

The bell crank levers 55 of these auxiliary lock units 13 have an arm 55 thereof engaged in a relatively wide transverse opening 56 of the auxiliary bolt 52 and have the other arm 55 thereof projecting from the housing member 53 and provided with an eye portion 57 at the outer end thereof. The links 14 and 15 have the outer or remote ends thereof connected'with the eyes 57 of the bell crank levers 55 by means of pivot pins 58 which are carried by the eye portions and extend through longitudinal slots 59 provided in such remote ends of the links.

The adjacent or inner ends of the links 14 and 15 extend in transverse crossing relation to therear side of the body 18 of the main lock unit 12 and carry forwardly extending angular lug, portions 60 and61. These lug portions are secured to the outer ends of the plungers 31 and 30, respectively, as by means of the clamping screws 62.

In the operation of the lock mechanism 10,-the-compression springs 54 normally hold the auxiliary bolts'52 in an extended or locking position and the forceof-these springs is also transmitted through the bell crank levers 35 and the links 14 and 15 to the plungers 30 and 31. The expansive action of the springs 54 is effective on the plungers 30 and 31 as a pulling force acting to normally hold these plungers in their inward or retracted position in which they exert a wedging force against the inner end of the first bolt 29 for normally holding the latter in its projected or locking position.

The slots 59 of the links 14 and 1.5 and the relatively wide openings 56 of the auxiliary bolts 52 provide a lost motion characteristic for the operating connections between the plungers 30 and 31 and the auxiliary bolts 52, such that the first bolt 29 and the auxiliary bolts can move inward-1y in their guideways without causing or requiring any actuation of the handle means 37. This free inward movement of the bolts permits the same to move over or past striker members (not shown) with which they cooperate and thus permits the door 11 to be slammed to its closed position without requiring or resulting in any outward swinging movement of the handle means 37. The action of the springs 54 in holding the bolts in their normally projected position, is also effective on the arm 39 of the handle means 37 for retaining the plate member 38 in its substantially flush retracted position.

The plungers 30 and 31 are capable of free outward movement away from the wedge projection 33 of the first bolt 29 and, this being the case, the slots 59 can be omitted if desired. When the slots 59 are omitted, the links 14 and 15 are merely provided with holes at this point in which the pivot pins '58 engage.

When'the handle means 37 is manually actuated by imparting an outward swinging movement to the plate member 38 causing the above-explained retraction of the first bolt 29 and the outward expansion of the plungers 30 and '31, the outward movement of these plungers transmits pulling'motion through the links 14 and 15 to the bell crank levers 55 of the auxiliary lock units 13. This pulling movement applied to the bell crank levers by the links 14 and 15 retracts the auxiliary bolts 52 against the force of the springs 54.

With respect to the oppositely inclined bearing surfaces 30 and 31 of the plungers 30 and 31 and the oppositely inclined bearing surfaces 29 and 29 of the first bolt 29, it should be explained that these bearing surfaces are all constructed so as to have a smooth and polished surface characteristic. This polished surface characteristic of these bearing surfaces minimizes the friction between the wedge elements of the plungers and the first 'bolt '29, such that movement will be freely transmitted back and forth between the plungers and first bolt.

If desired, the 'lock mechanism 10 can be provided with a key-actuated locking means 64 which is here shown as being carried by a flange extension 65 of the body 18. This key-actuated means is here shown as comprising a swinga'ble latch 66 adapted to be actuated by manual rotation of a key 67 inserted into a conventional pivoted lock barrel 68. The latch 66 is engageable in a pair of slots 69 and 70 which are in registering relation when the plate member 38 of the handle means 37 is in its retracted or flush position. The slot 69 is located in the inturned flange 41 of the plate member 38 and the slot 70 is located in the adjacent side wall 19 of the body 18. Although the key-actuated locking means 64 is illustrated inthe drawings asforrning a part of the lock mechanism '10, it will be understood, of course, that this key-actuated locking means can be omitted.

From the foregoing detailed description and the accompanying drawings, it will now be readily understood that'this invention provides a novel lock mechanism of the multiple-bolt type in which cooperating wedge elements are utilized in the transmission of actuating movement between a first bolt and-one or more auxiliary bolts. It will, -likeWise, be-seen that this lock mechanism embodies the feature of a flush position for the main lock unit, such that neither the'handle means nor any other part of the mechanism will normally occupy a'projecting position in which it might cause personal injury. Additionally, it will be seen that this lock mechanism is of a very simple construction comprising a relatively small number of parts adapted to be economically manufactured and assembled.

Although the lock mechanism of this invention has been illustrated and described herein to a somewhat detailed extent, it will be understood, of course, that the invention is not to be regarded as being limited correspondingly in scope, but includes all changes and modifications coming within the terms and scope of the claims hereof.

Having thus described my invention, I claim:

1. In lock mechanism of the character described, a sheet metal body including a bottom wall having first and second guideways thereon of which the first guideway intersects the second guideway at substantially right angles at an intermediate point of the latter, a first bolt slidable in said first guideway, handle means supported by said body for pivotal movement and engageable with said first bolt for causing movement of the latter along said first guideway, other movable bolt means including a pair of members slidable in said second guideway with their inner ends presented toward the inner end of said first bolt, oppositely inclined bearing surfaces on the inner ends of said members and defining a wedge recess and oppositely inclined bearing surfaces on said first bolt and defining a wedge portion on the latter having cooperating wedging engagement in said wedge recess such that movement of said first bolt along said first guideway wedgingly imparts movement to said members in an outward direction along said second guideway.

2. In lock mechanism of the character described, a substantially pan-shaped sheet metal body defining a top recess and including a bottom wall having first and second guideways thereon of which the first guideway intersects the second guideway at substantially right angles at an intermediate point of the latter, a first bolt slidable in said first guideway, a single handle member located in said top recess and supported by said body for pivotal movement and having a portion engageable with said first bolt for causing movement of the latter along said first guideway, other movable bolt means including a pair of members slidable in said second guideway with their inner ends presented toward the inner end of said first bolt, oppositely inclined bearing surfaces on said members and defining a wedge recess between their inner ends, said first bolt having oppositely inclined hearing surfaces on its inner end defining a wedge projection engaging in said wedge recess such that the inward movement of said first bolt along said first guideway wedgingly imparts movement to said members in an outward direction along said second guideway, and spring means effective to constantly maintain the bearing surfaces of said members in engagement with the bearing surfaces of said first bolt, said handle having a plate portion forming a partial cover for said top recess.

3. In lock mechanism of the character described, a body having first and second guideways of which the first guideway intersects the second guideway at substantially right angles at an intermediate point of the latter, a first bolt slidable in said first guideway, handle means supported by said body for pivotal movement and engageable with said first bolt for causing movement of the latter along said first guideway, a pair of plungers slidable in said second guideway with their inner ends presented toward the inner end of said first bolt, housing members on opposite sides of said body, other bolts movable in said housing members, movement transmitting means for transmitting motion between said plungers and said other bolts including a pair of links having their adjacent ends connected with said plungers, and bearing surfaces on said plungers and first bolt and having cooperating wedging engagement suchthat' movement of said first bolt along said first guideway wedgingly imparts movements to said plungers in an outward direction along said second guideway for transmission to said other bolts through said transmitting means.

4. Lock mechanism as defined in claim 3 in which said links extend in transverse crossing relation to said body.

5. In lock mechanism of the character described, a body having first and second guideways of which the first guideway intersects the second guideway at substantially right angles at an intermediate point of the latter, a first bolt slidable in said first guideway, handle means supported by said body for pivotal movement and engageable with said first bolt for causing movement of the latter along said first guideway, a pair of plungers slidable in said second guideway with their inner ends presented toward the inner end of said first bolt, housing members on opposite sides of said body, other bolts movable in said housing members, movement transmitting means for transmitting motion between said plungers and said other bolts including a pair of links having their adjacent ends connected with said plungers, bearing surfaces on said plungers and first bolt and having cooperating wedging engagement such that movement of said first bolt along said first guideway wedgingly imparts movement to said plungers in an outward direction along said second guideway for transmission to said other bolts through said movement transmitting means, and spring means acting to project said other bolts and also efiective on said first bolt through said movement transmitting means such that the bearing surfaces of said plungers are constantly maintained in engagement with the bearing surfaces of said first bolt.

6. In a lock mechanism, a sheet metal body of substantially pan-like shape having walls including a substantially flat bottom wall and defining a recess of substantially uniform depth extending into said body from the front side thereof, said body being adapted for substantially flush installation in a front surface opening of a door, handle means mounted on said body for pivotal movement and including a plate portion disposed in and forming a partial cover for said recess, means carried by said bottom wall and defining first and second guideways of which the first guideway intersects the second guideway at substantially right angles at an intermediate point of the latter, a first bolt slidable in said first giudeway, said bottom wall having a slot therein connecting said first guideway with said recess and said handle means having an arm extending through said slot and engaging said first bolt, other movable bolt means including a pair of members slidable in said second guide- Way with their inner ends presented toward the inner end of said first bolt, and bearing surfaces on said members and first bolt and having cooperating wedging engagement such that movement of said first bolt along said first guideway wedgingly imparts movement to said members in an outward direction along said second guideway.

7. In a lock mechanism, a sheet metal body of substantially pan-like shape having walls including a substantially fiat bottom wall and defining a recess of substantially uniform depth extending into said body from the front side thereof, said body being adapted for substantially flush installation in a front surface opening of a door, handle means mounted on said body for pivotal movement and including a plate portion disposed in and forming a partial cover for said recess, means carried by said bottom wall and defining first and second guideways of which the first guideway intersects the second guide- Way at substantially right angles at an intermediate point of the latter, a first bolt slidable in said first guideway, said bottom wall having a slot therein connecting said first guideway with said recess and said handle means having an arm extending through said slot and engaging said first bolt, other movable bolt means including a pair of members slidable in said second guideway with their inner ends presented toward the inner end of said first bolt, bearing surfaces on said members and first bolt and having cooperating wedging engagement such that movement of said first bolt along said first guideway wedgingly imparts movement to said members in an outward direction along said second guideway, and spring means effective to constantly maintain the bearing surfaces of said members in engagement with the bearing surfaces of said first bolt.

8. In a lock mechanism, a sheet metal body of substantially pan-like shape having walls including a substantially fiat bottom wall and defining a recess of substantially uniform depth extending into said body from the front side thereof, said body being adapted for substantially fiush installation in a front surface opening of a door, handle means mounted on said body for pivotal movement and including a plate portion disposed in and forming a partial cover for said recess, means carried by said bottom wall and defining first and second guideways of which the first guideway intersects the second guideway at substantially right angles at an intermediate point of the latter, a first bolt slidable in said first guideway, said bottom wall having a slot therein connecting said first guideway with said recess and said handle means having an arm extending through said slot and engaging said first bolt, a pair of plunge-rs slidable in said second guideway with their inner ends presented toward the inner end of said first bolt, housing members on opposite sides of said body, other bolts movable in said housing members, movement transmitting means for transmitting motion between said plungers and said other bolts including a pair of links having their adjacent ends connected with said plungers, and bearing surfaces on said plungers and first bolt and having cooperating wedging engagement such that movement of said first bolt along said first guideway wedgingly imparts movement to said plungers in an outward direction along said second guideway for transmission to said other bolts through said movement transmitting means.

9. In a lock mechanism, a sheet metal body of substantially pan-like shape having walls including a substantially flat bottom wall and defining a recess of substantially uniform depth extending into said body from the front side thereof, said body being adapted for substantially flush installation in a front surface opening of a door, handle means mounted on said body for pivotal movement and including a plate portion disposed in and forming a partial cover for said recess, means carried by said bottom wall and defining first and second guideways of which the first guideway intersects the second guideway at substantially right angles at an intermediate point of the latter, a first bolt slidable in said first guideway, said bottom wall having a slot therein connecting said first guideway with said recess and said handle means having an arm extending through said slot and engaging said first bolt, a pair of plungers slidable in said second guideway with their inner ends presented toward the inner end of said first bolt, housing members on opposite sides of said body, other bolts movable in said housing members, movement transmitting means for transmitting motion between said plungers and said other bolts including a pair of links having their adjacent ends connected with said plungers, bearing surfaces on said plungers and first bolt and having cooperating wedging engagement such that movement of said first bolt along said first guideway wedgingly imparts movement to said plungers in an outward direction along said second guideway for transmission to said other bolts through said transmitting means, and spring means acting to project said other bolts and also effective on said first bolt through said movement transmitting means such that the bearing surfaces of said plungers are constantly maintained in engagement with the bearing surfaces of said first bolt.

10. Lock mechanism as defined in claim 9 in which said links extend in transversely crossing relation to said body on the rear side thereof.

References Cited in the file of this patent 

